When a product is ready to be made there are specific types of documentation that manufactures need so that they can make the product. These documents are typical 2D Drawings and 3D CAD files. These documents are used to communicate all the information required by the manufacturer so that they can make the product. These documents are a legal document and should be treated as such. If there is ever a discrepancy between what a manufacture delivers, and what a client wanted the handoff documentation is consulted to determine fault.
A mechanism is a device that takes some input and converts it into a useful output. Mechanisms range greatly in size and complexity. Many seemingly simple consumer products have very clever mechanisms built into them. These mechanisms can be used to lock something securely in place, actuate a button, or